| Digest Nr | Subject and Author |
|---|
 |
| 2025.04.28.02 | Pell Harmonette Organ PIN Code and Battery, from Bill Klinger |
| 2025.04.23.02 | Pell Harmonette Organ PIN Code and Battery, from Wallace Venable |
| 2024.01.24.01 | Passing of Grahame Code, from Jim Marke |
| 2024.01.17.01 | Passing of Grahame Code, Australian Historian, from Grahame Code |
| 2012.04.20.02 | DVD "The Ampico Code - Part Two", from Ken Vinen |
| 2012.04.04.03 | DVD "The Ampico Code", from Bob Taylor |
| 2012.04.03.02 | DVD "The Ampico Code - Part Two", from Bob Taylor |
| 2012.03.01.03 | DVD on Ampico Code, from Bob Taylor |
| 2006.01.10.02 | Code Letters on Aeolian Pipe Organ Box Labels, from Pete Knobloch |
| 2006.01.09.03 | Code Letters on Aeolian Pipe Organ Box Labels, from Bob Taylor |
| 2002.12.02.02 | Leather Supply House - New Area Code, from Ray and Marilyn McLeland |
| 2002.12.02.01 | PianoDisc CD Player (Mark Fontana) Subject: Leather Supply House - New Area Code, from Ray and Marilyn McLeland |
| 2000.11.10.03 | Telephone Area Code Changes in North America, from Matthew Caulfield |
| 1999.01.06.01 | The Telegraph, Binary Code and Music Rolls, from Joyce Brite |
|
